Journal of Materials Chemistry A
·
2024
·
IF 10.7
Wen Lu,Chen Wang,Wenhui Song,Zhixiong Zhang,Chengde Xie,Jianjun Wang
The heavy metal ion hexavalent chromium (Cr(VI)) in wastewater significantly threatens public health. Heterojunction photocatalysts typically demonstrate high reduction efficiency in water for Cr(VI) contamination. Overcoming the drawbacks of single metal organic frameworks (MOFs) or covalent organic frameworks (COFs), MOF@COF heterostructures inherit the advantages of large porosity, high surface area, and multiple active sites of single components. Herein, we report novel hybrid UiO-66-NH2@HDU-25 heterojunctions based on a condensation reaction. The optimal ratio of UiO-66-NH2@HDU-25 presented significantly superior photocatalytic activity to most reported MOFs and COFs due to heterojunction formation, which promoted charge separation. Under identical conditions, the optimally formulated UiO-66-NH2@HDU-25 could remove over 99% of Cr(VI), approximately 1.8 and 2.6 times the original UiO-66-NH2 and HDU-25 levels. Furthermore, the UiO-66-NH2@HDU-25 (8 : 1) heterojunction demonstrated favorable reusability and stability over five reaction cycles. Various experiments and density functional theory (DFT) calculations investigated the charge carrier transport pathways and possible photocatalytic mechanisms. The Z-scheme mechanism for the photocatalytic Cr(VI) reduction by UiO-66-NH2@HDU-25 was proposed and validated. This work aims to open new horizons for preparing novel photocatalyst heterojunctions with excellent visible light responsiveness for environmental water remediation.
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Materials Today Chemistry
·
2023
·
IF 7.3
Mao Guo,Siyang Dong,Jing Xiong,Xuanyang Jin,Pengfei Wan,Shengjun Lu,Yufei Zhang,Jian Xu,Haosen Fan
Flexible core-shell polyacrylonitrile (PAN)/carbon nanotubes (CNTs)@Poly(vinylidene fluoride-co-hexafluoropropylene) (PVDF-HFP)/Uio-66-NH 2 (PC@PU) hybrid nanofiber membrane was prepared by coaxial electrospinning technology. PAN polymer and CNTs particles were used as core to improve the membrane structure stability for further ensuring the thermal stability of the separator. PVDF-HFP and Uio-66-NH 2 nanoparticles were applied to reinforce the affinity of separator to electrolyte. The PC@PU composite membrane delivered high thermal stability and fantastic electrolyte affinity (545.76%). Furthermore, compared with Celgard 2325 commercial membrane, the PC@PU composite membrane exhibited higher porosity (80.22%) and higher Li + conductivity (3.43 mS/cm), leading to superior rate performance and long-term cycle stability. The cell with the PC@PU hybrid membrane displayed high specific capacity of 143 mAh/g at 1C and only 0.0259% capacity attenuation of each cycle after 1000 cycles. In addition, the PC@PU composite membrane demonstrated remarkable flexibility, and the cells with bent separators exhibited outstanding electrochemical performance. Hence, the PC@PU hybrid nanofiber membrane can pave a way for the further application in the field of secondary batteries separator.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2022
·
IF 5.518
Zhuanhong Jia,Xiaojun Dai,Bin Liu,Yan Li,Chunmiao Bo
Advanced adsorbents with high adsorption capacity and adsorption selectivity are desirable. Here, a Zr-based metal-organic framework (MOF), UiO-66-NH 2 @poly(sodium 4-styrenesulfonate, Nass), was synthesized using the high surface area of MOFs as a substrate and the high grafting density of surface initiated-atom transfer radical polymerization (SI-ATRP). UiO-66-NH 2 @poly(Nass) was used to adsorb different dyes. The maximum adsorption capacity ( Q m ) of methylene blue (MB) and basic fuchsine (BF) was 299.8 and 789.2 mg·g −1 , respectively, which were higher than those of Sudan I (SD I, 6.340 mg·g −1 ), neutral red (NR, 188.1 mg·g −1 ), methyl orange (MO, 199.5 mg·g −1 ), and acid chrome blue K (AK, 122.3 mg·g −1 ). The adsorption isotherms and kinetics were investigated, and it was confirmed that the Langmuir isotherm and the pseudosecond-order kinetic model fit our adsorbents. In the binary mixed solution, the removal rate (R) of MB reached 64.44%, while that of MO was only 3.340% for MB/MO. R was 64.29% for MB and 21.97% for AK for MB/AK and 97.45% for BF and 30.03% for MO for BF/MO, verifying the preferential selectivity to adsorb basic dyes. The superior adsorption was ascribed to multiple interactions, including electrostatic interaction , hydrogen bonding , and π–π accumulation. In addition, the effect of grafting poly(Nass) on the pore size of UiO-66-NH 2 was studied. The excellent stability showed that the R dropped by less than 15.62% after five consecutive cycles. The UiO-66-NH 2 @poly(Nass) was applied in the determination of MB and BF in water, crucian carp, and green shrimp. Good linearity was observed for MB (R 2 = 0.9971) and BF (R 2 = 0.9993) in the range of 0.2–30 and 0.5–50 μg·mL -1 , respectively, with satisfactory recoveries (in the range of 87.45–101.3% for MB and 90.34–98.86% for BF), achieving favorable practicability.
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ACS Applied Nano Materials
·
2022
·
IF 6.14
Chengyan Wang,Yangsai Lyu,Jia Li,Li Li,Tingting Li,Jie Yang,Ningning Xing,Xiaolei Zhang
Excessive fluorine can cause a serious threat to human health. It is significant but challenging to develop a straightforward and rapid way to simultaneously detect and remove excess F– from water. Herein, we presented a three-dimensional (3D) hierarchical UiO-66-NH2 nanoparticle/γ-AlO(OH) nanowire hybrid synthesized by a facile biotemplate route for simultaneous detection and removal of F– from water. We elaborately assembled two kinds of materials in a bioinspired 3D hierarchical structure as a functional unit to achieve detection and removal of dual functions. The outer UiO-66-NH2 nanoparticles served as a fluorescent sensor to detect and capture F– via a strong fluorescence enhancement effect caused by the electron transfer from F– and γ-AlO(OH) and acted as the capture unit of F–. The inner γ-AlO(OH) nanowire layer served as a F– absorbent through ion exchange between F– and γ-AlO(OH). The resulting UiO-66-NH2 nanoparticle/γ-AlO(OH) nanowire hybrid displayed excellent selectivity and sensitivity for F– detection (the detection range was 0–5 mM and the limit of detection was as low as 0.77 μM) and high capacity for F– removal (the maximum equilibrium adsorption capacity qmax was as high as 87.0 mg g–1). This dual-function material provided a strategy for simultaneously selective sensing and efficient removal of anionic pollutants from water.
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CHEMICAL ENGINEERING JOURNAL
·
2020
·
IF 10.652
Mengmeng Zhang,Kun Yang,Junshuo Cui,Haibiao Yu,Yuejiao Wang,Weijun Shan,Zhenning Lou,Ying Xiong
With the ever-increasing of Rare Earth Elements (REEs) in various high technology applications, efficient recovery of REEs from liquid sources is becoming significantly important. In this work, ZIF-8 and UiO-66-NH 2 (U6N) are combined to form a 3D-agaric like core-shell structure hybrid material (U6N@ZIF-8-20), which exhibits good performance in REEs extraction. Due to the abundant adsorption sites of ZIF-8 and the excellent water stability of UiO-66-NH 2 , 3D-agaric like U6N@ZIF-8-20 showed quick adsorption rate (only 10 min to reach equilibrium), high adsorption capacity and selectivity for REEs from water compared to other reported adsorbents. Maximum adsorption capacities of U6N@ZIF-8-20 for neodymium (Nd(III)), europium (Eu(III)), gadolinium (Gd(III)) and erbium (Er(III)) achieved to 249.90, 295.28, 316.22 and 340.95 mg g -1 , respectively. U6N@ZIF-8-20 has superiority in selective adsorption of REEs from Cd(II), Zn(II), Cu(II), Mn(II) and Co(II) coexistence solution. The order of adsorption capacities for REEs is in agreement with the order of their electronegativity, ionic radius and charge density. Moreover, U6N@ZIF-8-20 showed better water stability and recyclability than single MOF. Overall, MOF@MOF hybrid material has efficiency in REEs separation from solutions, and has great advantage in the application of wastewater treating.
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TALANTA
·
2025
·
IF 6.1
Mengting Liu,Zuncai Gu,Lu Qian,Kawtar Ettayri,Tao Deng,Chenhao Zhang,Jing Qian,Xingyi Huang,Chengquan Wang
Oxytetracycline (OTC), a broad class of antibacterial medication, has been widely utilized in poultry husbandry and fish farming. However, the presence of OTC residues in the food has become a matter of great concern. These residues have the potential to induce the emergence and spread of bacterial resistance, which can have far-reaching consequences for public health. In this work, we focused on the comparison of the quenching efficiency of UiO-66 and its amino group-modified counterpart UiO-66-NH 2 , towards the fluorescence of nitrogen-doped graphene quantum dots (NGQDs) labeled aptamer (NGQDs-apt). It was found that UiO-66-NH 2 demonstrated a more potent fluorescence quenching ability towards NGQDs-apt, as high as 98.8 %, compared to 69.7 % for UiO-66 without amino functionalization. This enhanced performance is attributed to the improved interaction between the amino groups on UiO-66-NH 2 and the NGQDs-apt, facilitating more effective electron transfer. Consequently, UiO-66-NH 2 was selected as the optimal quencher for the development of a highly sensitive aptasensor. This aptasensor demonstrates a quantitative detection range for OTC spanning from 0.001 to 200 μM with an exceptionally low detection limit of 0.25 nM, showing simplicity, accuracy, stability and great potential for antibiotic residue detection in food samples. This work addresses the urgent need to develop reliable methods for detecting OTC residues in food due to the potential of OTC to trigger bacterial resistance, which is crucial for food safety and public health.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Shuaitian Jia,Zan Chen,Yinhui Li,Claudia Li,Cuijia Duan,Kang Hui Lim,Sibudjing Kawi
The disposal of waste lithium batteries , especially waste separators, has always been a problem, incineration and burial will cause environmental pollution, therefore, the development of degradable and high-performance separators has become an important challenge. Herein, UiO-66-NH 2 particles were successfully anchored onto bacterial cellulose (BC) separators by epichlorohydrin (ECH) as a crosslinker, then a BC/UiO-66-NH 2 composite separator was prepared by vacuum filtration. The ammonia groups (−NH 2 ) from UiO-66-NH 2 can form hydrogen bonds with PF 6 − in the electrolyte, promoting lithium-ion transference. Additionally, UiO-66-NH 2 can store the electrolyte and tune the porosity of the separator. The lithium ion migration number (0.62) of the battery assembled with BC/UiO-66-NH 2 composite separator increased by 50 % compared to the battery assembled with commercial PP separator (0.45). The discharge specific capacity of the battery assembled with BC/UIO-66-NH 2 composite separator after 50 charge and discharge cycles is 145.4 mAh/g, which is higher than the average discharge specific capacity of 114.3 mAh/g of the battery assembled with PP separator. When the current density is 2C, the minimum discharge capacity of the battery assembled with BC/UiO-66-NH 2 composite separator is 85.3 mAh/g. The electrochemical performance of the BC/UiO-66-NH 2 composite separator is significantly better than that of the commercial PP separator. In addition, -NH 2 can offer a nitrogen source to facilitate degradation of the BC separators, whereby the BC/UiO-66-NH 2 composite separator could be completely degraded in 15 days.
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CHEMICAL ENGINEERING SCIENCE
·
2022
·
IF 4.889
Shusu Shen,Yang Shen,Yi Wu,Honglin Li,Chang Sun,Ganwei Zhang,Yongfu Guo
UiO-66-NH 2 is a well-known metal organic framework with high porosity and surface area, and there are modifiable reactive amino groups in its structure, it has been applied in membrane modifications. A novel composite membrane (U1gFx) is successfully prepared by depositing UiO-66-NH 2 onto polyvinylidene fluoride (PVDF) membrane, and subsequently grafting with perfluoroalkyl polyethoxy acetic acid (FPEOAA). The water contact angle of the modified membrane declines from 124.27° to 71.05°, and the under-water oil contact angle increases from 86.03° to 149.45°, indicating a good hydrophilic and oleophobic change. The modified membranes show enlarged porosity and water flux due to the introduction of UiO-66-NH 2 . The optimum membrane (U1gF10) shows excellent separation performance for various oil/water emulsions, including n -hexadecane, petroleum ether, dichloromethane and soybean oil. > 95 % oil rejection and up to 8081.9 L·m −2 ·h −1 of permeation flux are achieved under the vacuum filtration mode (0.085 MPa). While treating the n -hexadecane/water emulsion, all membranes show > 99 % oil rejection in six filtration cycles. Under a dead-end filtration mode, membrane U1gF10 gives a high relative flux recovery rate at 93 % under 0.1 MPa, its pure water flux still keeps as highly as 982.5 L·m −2 ·h −1 , even after three filtration cycles, indicating a good antifouling property and great engineering application potential.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2022
·
IF 5.518
Minjia Meng,Suao Wang,Jingyi Dai,Yi Li,Yonghai Feng,Yu Zhu,Hongbo Zhang,Yan Liu
In this work, a simple metal-organic framework (MOF) material, UiO-66-NH 2 , was prepared for the highly efficient separation of artemisinin (Art) and artesunate (Aru). Selective adsorption tests showed that UiO-66-NH 2 presented a much higher selectivity toward Aru than Art ( α Aru/Art = 40.74). The N 2 adsorption-desorption isotherm results of UiO-66-NH 2 indicated a suitable pore size to enable the free entry of Art and Aru. Contact angle analysis indicated that UiO-66-NH 2 is hydrophilic with the -NH 2 group, and can interact with the hydrophobic Aru through hydrogen bonding between the -NH 2 and -COOH groups, which is not possible with the hydrophobic Art. The selective adsorption of Aru onto UiO-66-NH 2 may be attributed to three factors: pore size, functional groups, and difference in hydrophobic/hydrophilic characteristics between the adsorbent and adsorbate. Molecularly imprinted polymers (MIPs) were prepared using Aru as a template for selective adsorption experiments to verify the excellent selectivity of UiO-66-NH 2 . The adsorption amount (65.24 mg g −1 ) and selectivity factor ( α Aru/Art = 40.74) of UiO-66-NH 2 toward Aru were significantly better than those of the MIPs (2.039 mg g −1 and 3.072, respectively). The binding capacity and better selectivity of UiO-66-NH 2 provide evidence supporting the potential of MOF adsorbents for the separation of various analogous molecules.
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CRYSTAL GROWTH & DESIGN
·
2026
·Vol. 26
·期 16
·6407-6421
·
IF 3.6
Zhao Tian,Peng Shilin,Li Yongjie,Chen Huayu,Yu Jiangrong,Shen Ling,Janiak Christoph,Chen Ying,Chen Yi
Achieving uniform zinc deposition is crucial for high-performance
aqueous zinc-ion batteries, yet it remains a significant challenge.
While functional separators based on metal–organic frameworks
(MOFs) like UiO-66-NH 2 offer a promising route to regulate
ion flux, their effectiveness is often hampered by the energy-intensive
synthesis of MOFs and their poor dispersion within polymer matrices.
Herein, we report a rapid, room-temperature ultrasound-assisted synthesis
that yields UiO-66-NH 2 with a unique surface-fused morphology
and a hierarchical pore system within just 1 h. Unlike its conventional
counterpart with a well-defined octahedral shape, this ultrasound-induced
MOF (U-UN) forms a homogeneous and tightly integrated composite with
cellulose nanofibers, constructing a separator with optimized ion-transport
channels and interfacial stability. The U-UN-based separator demonstrates
superior ionic conductivity and Zn 2+ transference number,
effectively guiding the preferential growth of Zn along the (002)
plane. Consequently, a Zn||Zn symmetric cell equipped with this separator
achieves an ultrastable cycling life exceeding 1180 h, and a Zn||MnO 2 full cell retains nearly 100% capacity after 600 cycles at
1 A g –1 . This work not only presents a green and
efficient synthesis strategy for advanced MOFs but also provides fundamental
insights into the design of functional separators through microstructure
engineering for long-lasting metal batteries.
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ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING
·
2026
·
IF 3.1
Afridi Muhammad Naveed,Adil Sawaira,Fatima Rida,Khan Fazal Maula,Ali Imran,Mir Irshad Ahmad,Miao Baoji,Lee Kang Hoon
Heavy metal contamination in industrial wastewater remains a critical global environmental concern. In this study, an Al/Mg/Zr-MOF (AMZ-MOF) was synthesized via a solvothermal method and systematically evaluated for Cr (VI) removal from aqueous solutions. Comparative analysis demonstrated that AMZ-MOF exhibited superior Cr (VI) removal efficiency relative to pristine Zr-MOF, Mg/Zr-MOF, and Al/Zr-MOF. The synthesized AMZ-MOF composite was subjected to comprehensive characterization using FESEM, TEM, XRD, BET, FTIR, and XPS analyses. The study systematically investigated the influence of key operational parameters, including contact time, temperature, pH, and initial Cr (VI) concentration, on the composite’s sorption behavior. AMZ-MOF demonstrated exceptional performance, achieving a maximum Cr (VI) sorption capacity of 185.2 mg/g. Remarkably, the sorbent exhibited rapid initial uptake kinetics, reaching adsorption equilibrium within 120 min. Mechanistic insight was gained through adsorption isotherm and kinetic modeling, revealing that the process is best described by the Langmuir isotherm and the Pseudo-Second-Order kinetic model, suggesting monolayer adsorption onto a heterogeneous surface and chemisorption as the rate-limiting step, respectively. Further FTIR and XPS analyses corroborated the proposed sorption mechanism, clarifying the key functional groups and surface interactions involved in Cr (VI) removal. The proposed adsorbent demonstrated excellent reusability over five adsorption–desorption cycles, underscoring its stability and practical potential for Cr (VI) remediation.
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INORGANIC CHEMISTRY
·
2026
·
IF 4.7
Chaofeng Zhang,Yinhui Yi,Yong Zhao,Gangbing Zhu
This study prepared UiO-66-NH2 MOFs embedded with Ru-tris(2,2′-bipyridyl)(II) hybrids as a nanozyme (designated as Ru/UiO-66-NH2) to propose a bioenzyme-free homogeneous electrochemical (HEC) sensing strategy for detecting organophosphorus pesticides (OPs). Experimental investigation coupled with density functional theory calculation demonstrated that the Ru incorporation significantly amplifies the peroxidase-like (POD-like) activity of UiO-66-NH2 MOFs and that the Ru/UiO-66-NH2 nanozyme exhibits selective responsiveness to coordinate with the OP molecules. Upon OP exposure, the specifical coordination between OPs and MOF structure effectively inhibits the nanozyme’s activity. Utilizing o-phenylenediamine as the catalytic substrate and glyphosate as a model of OPs, the optimized HEC sensor achieves an extensive linear detection range (0.5–10,000 ng/mL) and a low detection limit of 0.13 ng/mL as well as satisfactory recoveries in the real samples of tomato extract and water. It is expected that this innovative bioenzyme-free HEC sensing strategy represents a promising advancement for practical OP residue analysis with potential applications in various fields.
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